{"affected":[{"defaultStatus":"unaffected","ecosystem":"cargo","packageName":"hickory-dns","product":"hickory-dns","source":"CNA: VulnCheck","vendor":"hickory-dns","versions":[{"lessThanOrEqual":"0.26.1","status":"affected","version":"0.24.0","versionType":"semver"}]}],"cveId":"CVE-2026-123576","cwes":["CWE-770"],"description":"Hickory DNS 0.24.0 through 0.26.1 contains a memory exhaustion vulnerability that allows remote attackers to consume server resources by sending incomplete DNS-over-QUIC request bodies. Attackers can open many connections and send only large length prefixes, causing pre-allocated buffers to persist without timeout and exhausting server memory.","epss":{"date":"2026-11-10","percentile":0.35549,"score":0.00409},"exploits":[],"kev":null,"metrics":[{"score":8.7,"severity":"high","source":"CNA: VulnCheck","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0"},{"score":7.5,"severity":"high","source":"CNA: VulnCheck","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},{"score":8.7,"severity":"high","source":"NVD: disclosure@vulncheck.com","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","version":"4.0"},{"score":7.5,"severity":"high","source":"NVD: disclosure@vulncheck.com","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}],"modifiedAt":1794488736949,"publishedAt":1794101891970,"references":[{"source":"CNA: VulnCheck","tags":["vendor-advisory"],"url":"https://github.com/hickory-dns/hickory-dns/security/advisories/GHSA-2f4m-fq7w-mrgx"},{"source":"CNA: VulnCheck","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/hickory-dns-0.24.0-through-0.26.1-memory-exhaustion-via-dns-over-quic-requests"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/hickory-dns/hickory-dns/security/advisories/GHSA-2f4m-fq7w-mrgx"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://www.vulncheck.com/advisories/hickory-dns-0.24.0-through-0.26.1-memory-exhaustion-via-dns-over-quic-requests"}],"remediation":[],"revision":"118ed229bb8c355fbce2aa3c1eaa98987fb3afbef50e2ae38a1ac5ef67aeb8cc","sources":[{"modifiedAt":1794488736949,"name":"CNA: VulnCheck","retrievedAt":1794492542877,"url":"https://www.cve.org/CVERecord?id=CVE-2026-123576"},{"modifiedAt":1794348959797,"name":"NVD","retrievedAt":1794356342799,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-123576"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1794377570218,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-123576"}],"ssvc":{"assessedAt":1794488652113,"automatable":"yes","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"Hickory DNS 0.24.0 through 0.26.1 Memory Exhaustion via DNS-over-QUIC Requests","updatedAt":1794492542877}